Wrench.



a. WpSlEVERT.

WRENCH.

APPLIQATION FILED JULY 9, 1907.

PATENTED JANQZI, 190s.

CHARLES W. SIEVERT, OF LOS ANGELES, CALIFORNIA.

WRENCH.

Specification of Letters Patent.

Patented Jan. 21, 1908.

Application filed July 9, 1907. Serial No. 382823.

To all whom it "may concern:

Be it known that I, CHARLES W. SIEVERT, a citizen of the United States,residing in the city of Los Angeles, county of Los Angeles, and State ofCalifornia, have invented new and useful Improvements in Wrenches, ofwhich. the following is a specification.

The object of my invention primarily is to provide a pipe wrench that isadjustable to pipes of different sizes and which will grip the pipe insuch manner that the more force that is applied to turn the pipe thetighter the wrench will grip the same thereby rendering it practicallyimpossible for the wrench to slip on the pipe and which may be used as anut wrench. I accomplish this object by the wrench described herein andillustrated in the accompanying drawings in which;

Figure 1 is a side elevation of my improved pipe wrench. Fig. 2 is anedge elevation of the same. Fig. 3 is a section on the line 3-3 ofFig. 1. Fig. 4 isa plan of the abutment. Fig. 5 is a detail of a portionof the movable jaw.

In the drawings 10 is the fixed aw having a shank 11 which is secured tothe operating handle 12; In the shank of this jaw is a slot 13 and theouter surface of the shank within the slot is provided with teeth 14.The aw shank and handle are all preferably made integral and of steeldrop forged. Mounted within the slot in shank 11 is a movable dog 15which has teeth 16 that engage teeth 14 to prevent the dog from movingtoward the rear end of the handle. A spring 17 bears against theopposite side of the shank which forms the slot opposite the teeth andalso bears against the dog to hold the same from accidentally sliding inthe slot. Dog 15 is provided with trunnions 18 which have heads 18 onthe outer ends thereof. 19 is the movable jaw and is provided with teeth20 on the face thereof which is opposed to the fixed jaw 10, and saidfixed jaw has teeth 21 opposed to teeth 20 of the moving jaw. The

moving jaw is preferably triangular shaped with the central portion atone side out out to make the jaw lighter. The sliding jaw is slitted andstraddles the shank of the fixed jaw, and the front part of the slittedportion I will call front arms 21 and the rear portion rear arms 22. Thefront arms project beyond the shank of the fixed jaw and in the ends ismounted a cam lever 23 by means of which the sliding jaw can be lockedto the shank against movement when desired. The rear arms of the slidingjaw are mounted on the trunnions ofdog 15, and to mount these arms onsaid trunnions the rear portion 22 best shown in Fig. 5 is separated asshown in said figure from the other portions and after the arms areplaced in position on the trunnions this piece is returned to positionand is secured against separation therefrom by a screw 24 which partlyengages both parts as shown in said figure. A spring 25 is secured tojaw 19 within the slit and the free end thereof bears against the shankof the fixed jaw and holds the sliding jaws spring pressed as shown inFig. 1. i

In the operation of my wrench the same will be adjusted to fit upon thesize of pipe being used by sliding the movable dog in the slot until thejaws engage the pipe 26. It will be seen that when power is applied tothe handle that the more pressure that is applied thereto the tighterthe jaws will grip the pipe, because the rear arms of the sliding jawprevent any backward movement of the sliding jaw and they turn on thetrunnions so as to bring the jaws closer together thereby gripping thepipe more firmly. As soon as the handle is moved in the oppositedirection that portion of the sliding jaw which engages the pipe movesout or away from the shank of the fixed jaw thereby letting go its holdon the pipe. By making the jaws parallel omitting the teeth my wrench isadapted for a nut wrench.

Having described my invention what I claim is;

1. A pipe wrench comprising a fixed aw, having a slotted shank providedwith teeth on the side of the slot furthest from the fixed jaw and ahandle secured to said shank, said shank and handle extending rearwardlyand at right angles to the face of the fixed jaw; a sliding awlongitudinally movable along the shank of the fixed jaw between thehandle and the fixed jaw, said sliding jaw having rear arms straddlingthe shank of the fixed jaw and terminating at the slot thereof, andfront arms straddling said shank and extending beyond the same; a doghaving teeth pivotally connected to the rear arms of the sliding jaw,and longitudinally movable in the slotted shank of the fixed aw and aconnection between the front arms of the sliding jaw exterior the shankof the fixed jaw.

2. A wrench comprising a fixed jaw having a slotted shank with a handlesecured thereto, said shank being provided with teeth on the sidefurthest from the fixed jaw and extending at right angles from the faceof the jaw; a dog having teeth Within said slot, and a sliding jawlongitudinally movable along the shank of the fixed jaw between the facethereof and the handle, and having a pivotal connection to said dog, theteeth of said dog and shank being adapted to secure the dog againstmovement toward the handle when the Wrench is being operated.

shank; a sliding jaw longitudinally movable along the shank of the fixedj aw between said jaw and the handle, said sliding aw having rear armsstraddling the shank of the fixed jaw and terminating adjacent the slotthereof,and front arms straddling said shank and extending beyond thesame; a cam lever mounted in the ends of said front arms; a toothed dogpivotally connected to the rear arms of the slidingjaw andlongitudinally movable in the slotted shank of the fixed j aw; and aspring secured to said dog and bearing against the shank within theslot.

In witness that I claim the foregoing I have hereunto subscribed my namethis 2nd day of July, 1907.

CHARLES W. SIEVERT.

Witnesses:

G. E. HARPHAM, S. B. AUSTIN.

